How do you say "What the hell" in korean? (show how to pronounce)

How do you say Excuse Me in Korean? How do you say Excuse Me in korean? -Excuse me as in when you are asking for something -and excuse me as in when you're passing by both please!

How do you say Oh My God in Korean? How do you say and write Oh My God in Korean?

How do you say "goodbye" in korean if you were saying it to a friend? How do you say "goodbye" in korean if you were saying it to a friend?

How do you say "understood" or "i got it" in Korean? How do you say "understood" or "I got it" in Korean?

How do you say "thankyou" in Korean? How do you say Thankyou in Korean? Is it "Kahm-sa-hahm-ni-da" or Che-sa-hahm-ni-da"?